EP 0660591 A2 19950628 - A method for reducing colour crosstalk.
Title (en)
A method for reducing colour crosstalk.
Title (de)
Verfahren zur Reduzierung von Farbeinstrueung.
Title (fr)
Procédé de réduction d'interférence de la couleur.
Publication
Application
Priority
US 17379893 A 19931223
Abstract (en)
Colour crosstalk is determined between layers of an image storage medium based on the cross correlations and autocorrelations of noise in the grain pattern in each layer of the image storage medium. Rather than relying on prior measurement under laboratory conditions, the storage medium is scanned in a plurality of spectral bands to derive the record stored in each of the dye layers. A computer derives the autocorrelations and the crosscorrelations of a group of pixels between the plurality of colour records of the scanned images each of which corresponds to one of the spectral bands. The invention is based on the observation that as each dye layer is deposited separately in the film, one would expect that the "noise" from the grain boundaries in one layer to be independent from the "noise" due to the grain boundaries in other layers. If there is correlation in noise between separate colour scans, it is because the scanner is measuring the grain boundaries in more than one layer in the colour scans. <IMAGE>
IPC 1-7
IPC 8 full level
H04N 9/64 (2006.01); H04N 1/46 (2006.01); H04N 1/58 (2006.01); H04N 1/60 (2006.01); H04N 9/77 (2006.01)
CPC (source: EP US)
H04N 1/58 (2013.01 - EP US); H04N 1/6011 (2013.01 - EP US)
Designated contracting state (EPC)
DE FR GB
DOCDB simple family (publication)
US 5673336 A 19970930; DE 69429068 D1 20011220; DE 69429068 T2 20020321; EP 0660591 A2 19950628; EP 0660591 A3 19951206; EP 0660591 B1 20011114; JP 2669600 B2 19971029; JP H07212792 A 19950811; US 5509086 A 19960416
DOCDB simple family (application)
US 58487096 A 19960111; DE 69429068 T 19941220; EP 94309580 A 19941220; JP 24615594 A 19941012; US 17379893 A 19931223